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AD7291BCPZ Datasheet(PDF) 3 Page - Analog Devices

Part # AD7291BCPZ
Description  8-Channel, I2C, 12-Bit SAR ADC with Temperature Sensor
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7291BCPZ Datasheet(HTML) 3 Page - Analog Devices

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AD7291
Data Sheet
Rev. C | Page 2 of 28
TABLE OF CONTENTS
Features .............................................................................................. 1
 
Functional Block Diagram .............................................................. 1
 
General Description ......................................................................... 1
 
Product Highlights ........................................................................... 1
 
Revision History ............................................................................... 2
 
Specifications..................................................................................... 3
 
I2C Timing Specifications............................................................ 5
 
Absolute Maximum Ratings............................................................ 6
 
Thermal Resistance ...................................................................... 6
 
ESD Caution.................................................................................. 6
 
Pin Configuration and Function Descriptions............................. 7
 
Typical Performance Characteristics ............................................. 8
 
Terminology .................................................................................... 11
 
Circuit Information ........................................................................ 12
 
Converter Operation.................................................................. 12
 
Analog Input ............................................................................... 12
 
ADC Transfer Function............................................................. 13
 
Temperature Sensor Operation ................................................ 13
 
Temperature Sensor Averaging................................................. 13
 
VDRIVE ............................................................................................ 14
 
The Internal or External Reference.......................................... 14
 
Reset ............................................................................................. 14
 
Internal Register Structure ............................................................ 15
 
Address Pointer Register ........................................................... 15
 
Command Register (0x00)........................................................ 17
 
Voltage Conversion Result Register (0x01) ............................ 18
 
TSENSE Conversion Result Register (0x02)................................ 18
 
TSENSE Average Result Register (0x03) ...................................... 19
 
Limit Registers (0x04 to 0x1E) ................................................. 19
 
Hysteresis Register ..................................................................... 20
 
Alert Status Register A and Alert Status Register B (0x1F and
0x20)............................................................................................. 20
 
I2C Interface .................................................................................... 21
 
Serial Bus Address Byte ............................................................. 21
 
General I2C Timing.................................................................... 21
 
Writing to the AD7291 .................................................................. 22
 
Writing Two Bytes of Data to a 16-Bit Register ..................... 22
 
Writing to Multiple Registers.................................................... 22
 
Reading Data From the AD7291.................................................. 23
 
Reading Two Bytes of Data from a 16-Bit Register ............... 23
 
Modes of Operation ....................................................................... 24
 
Command Mode ........................................................................ 24
 
Autocycle Mode.......................................................................... 26
 
Outline Dimensions ....................................................................... 27
 
Ordering Guide .......................................................................... 27
 
REVISION HISTORY
10/2016—Rev. B to Rev. C
Changes to Command Mode Section .......................................... 25
10/2011—Rev. A to Rev. B
Changes to Table 9.......................................................................... 16
8/2011—Rev. 0 to Rev. A
Changes to Temperature Sensor—Internal, Accuracy Parameter,
Table 2 ................................................................................................ 3
1/2011—Revision 0: Initial Version


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